39541557009 has 4 divisors (see below), whose sum is σ = 52722076016. Its totient is φ = 26361038004.

The previous prime is 39541556993. The next prime is 39541557023. The reversal of 39541557009 is 90075514593.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39541557009 - 2⁴ = 39541556993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39541557079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6590259499 + ... + 6590259504.

It is an arithmetic number, because the mean of its divisors is an integer number (13180519004).

Almost surely, 2^39541557009 is an apocalyptic number.

It is an amenable number.

39541557009 is a deficient number, since it is larger than the sum of its proper divisors (13180519007).

39541557009 is a wasteful number, since it uses less digits than its factorization.

39541557009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180519006.

The product of its (nonzero) digits is 850500, while the sum is 48.

The spelling of 39541557009 in words is "thirty-nine billion, five hundred forty-one million, five hundred fifty-seven thousand, nine".